Turret tool-holder



F. 'EKMAN.

TURRET TOOL HOLDER. APPLICATION FILED APR. 3, 191a.

Patented Sept. 27, 1921.

(Hmong UNITED STA'IEE PATENT OFFICE.

FRED EKMAN, 0F HONOLULU, TERRITORY vOF HAWAII.

TURRET TOOL-HOLDER.

To all whom it may concern:

Be it known that I, FRED EKMAN a citizen of the United States, residingat Iionolulu, in the county of Honolulu and Territory of Hawaii, haveinvented new and useful Improvements in Turret Tool-Holders, of whichthe following is a specification.

This invention relates to improvements in turret tool holders for use inlathes and shapers, the object of the invention being to provide animproved toolholder of this class which is adapted to hold a number oftools a and to be .readily adjusted so that any one of the tools may beused as required and thus save the time required in changing the tools.

WVith the above and other objects in view, the invention consists in theconstruction, combination and arrangement of devices hereinafterdescribed and claimed.

In the accompanying drawing Figure 1 is a front elevation of the turrettoolholder constructed and arranged in accordance with my invention.

Fig. 2 is partly an elevation and partly a central sectional view of thesame.

Fig. 3 is a detail sectional view of the same on the plane indicated bythe line 33 of Fig. 1.

In accordance with my invention, the

standard 1 is provided with a frusto-conical recess 2 at one side, nearits upper end, and with a polygonal counter recess 3, which communicateswith the smaller end of the recess 2, said polygonal counter recessbeing here shown as square.

The head 4; of the toolholder is circular and is provided with aplurality of radially arranged tool holding arms 5 which are here shownas four in number, one for each side or" the counter recess. On its rearside, the head is provided with a centrally arranged frusto-conical.projection 6 which is adapted to fit in the recess 2, and also with apolygonal projection 7, which is adapted to fit in the counter recess 3.The head is also formed or provided with a screw stem 8 which'passesthrough an opening 9 at the center of the counter recess. A knurled locknut 10 is threadedly engaged with the screw stem and a washer 11 isinterposed between the nut and the rear side of the standard so that thehead may be secured firmly to the stand- Specification of LettersPatent. Patented S t 27 1921 Application filed April 3,

1918. Serial No. 226,448.

clamping screw 13 which will hold the tool 1n place. In practice,different tools are secured in the arms of the head, and by firstloosening the nut on the screw stem, the head can be partly withdrawnfrom the standard a suflicient distance to release the projection 7 fromthe counter recess and can be then turned to bring any desired tool inposition for use and can then be secured in such adjusted position bytightening the nut, and thus causing the projection? to coact with thesides of the polygonal counter recess to effectually lock the head andprevent it from turning to any extent when the tool is in use.

While I have herein shown and described a referred form of my invention,I will have 1t understood that changes may be made in the form,proportion and construction of the several parts without departing fromthe spirit of my invention and within the scope of the appended claim.The coacting sides of the projection and the polygonal recess alsoinsure that the tool will be in the required position for use.

The combination with a standard provided with a frusto-conical recessand having a polygonal recess communicating with the converging end ofsaid frustoconical recess, of a circular head provided with a centralopening and having a plurality of transverse openings thereincommunicating with said central opening, a plurality of tool holdingarms formed integrally upon diametrically opposite'sides of said head,provided with longitudinal openings therethrough communicating with thetransverse openings in said head and having transverse threaded openingstherein communicating with said longitudinal openings, a frusto-conicalprojection formed integrally on said head and engag-' gaging saidstandard, and set screws engaging the threaded openings in said toolholding arms.

In testimony whereof I afiix my signature. FRED EKMAN.

